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Forum topic by TooTall17 posted 04-04-2018 05:26 PM 628 views 0 times favorited 8 replies Add to Favorites Watch
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TooTall17

16 posts in 581 days


04-04-2018 05:26 PM

Topic tags/keywords: question lathe turning

Hello all,

I was given a lathe yesterday by a guy I work with. I’m 31, he’s 82, the lathe is older than me for sure. I don’t know exactly how old it is, or what brand etc. The motor runs and seems like all the necessary parts/pieces are there. I haven’t set it up yet, but last night while I was thinking about how to go about doing all that I had a thought. The motor has a 3 step pulley on the shaft, however the other part where the belt runs only has 1 pulley (the dome shaped piece sitting in front of the tool rest in the picture). So I’m thinking that means that if I got this set up, I could only run it at 1 speed, which wouldn’t be ideal, right?

Should I look into getting a 3 step pulley and put it on the shaft? If so, does anyone have any idea how to remove the shaft to replace the pulley? The belt is going to break sooner than later, so I tried to get the shaft out to pull the belt off and it would not come out at all. I read about link belts that look ilke they can be changed without removing any shafts etc. Is that the way to go for this?
Any other thoughts, suggestions, advice are more than welcome.

Thanks!!!


8 replies so far

View LittleShaver's profile

LittleShaver

555 posts in 1042 days


#1 posted 04-04-2018 05:36 PM

You have quite a long belt there from the looks of it. You should be able to get three speeds out of it without and issue. If you’re fussy about pulley alignment, you could mount the motor in slots to allow adjustment. I have an old lathe that has the motor mounted on pivot points. There is enough play to allow me to use all the steps. I have 4 steps on each pulley.

You could come up with your own version by attaching a rod to the bottom of the motor mount nearest the lathe and setting it into U shaped channel. The weight of the motor keeps the tension on the belt.

-- Sawdust Maker

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TooTall17

16 posts in 581 days


#2 posted 04-04-2018 05:47 PM

LittleShaver,

So even though I only have one 3 step Pulley I can still get 3 speeds? I was under the impression that in order for that to work you had to have two multi step pulleys like on a drill press.
The rod the single pulley is on can move within the housing some so maybe it was designed that way to accommodate different steps on the motor.

View MrUnix's profile

MrUnix

7408 posts in 2621 days


#3 posted 04-04-2018 05:56 PM

It’s been rigged by a PO and that is not how it shipped when new. You can improvise and use it as is by shifting the motor/belt as required to get the different speeds, or you can try to find a matching set of stepped pulleys to replace them with. Alternatively, if you are mechanically inclined, you can get a variable speed DC motor for it, which would give you a wide range of speeds. You can find them for super cheap or free by looking on CL for old treadmills. They have everything you would need except for the pulley on the motor.

In order to change the belt, you need to pull the spindle. They are typically designed so that is a pretty easy task, and one that needs to be done every now and then not just to replace the belt, but also to get to the spindle bearings. Figure out what model you have and get a manual for it. You can search through the photo archive over at the Vintagemachinery site or browse through the catalogs to determine what year/model you have.

Having said all of that – keep in mind that the lathe in question is at the lower end of useful, and while they will work pretty well for spindle stuff, they are notoriously bad for doing bowls and hollow forms. It is a good machine to dip your toe into the world of turning with, but I wouldn’t spend a ton of money on it. If you find that you really enjoy woodturning, you will be upgrading to a better lathe fairly soon :)

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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Andybb

1932 posts in 1026 days


#4 posted 04-04-2018 06:56 PM

I’d suggest doing what I did with a vintage lathe that I got for $25. Search CL for “free treadmill” and snatch the motor out of it. Then you have a variable speed motor with plenty of horsepower to do the job.

There should be a set screw on the shaft pulley.

Here and here are my results and advice from lj members. Works great. Lathes are easy to refurb cuz all they have to do is spin. Also bought a Barracuda2 chuck.

-- Andy - Seattle USA

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smitdog

433 posts in 2528 days


#5 posted 04-04-2018 07:45 PM

With one three-step pulley you will get 3 speeds. If you had a three step on both you would have 9 speeds through various combinations. To get your spindle RPM just take your motor RPM and multiply that by the pulley diameter ratio (to get the pulley ratio just take your motor pulley size divided by your spindle pulley size). So if the motor is 1750 RPM (just guessing) and given your pictures look like a 4” pulley on the headstock and a 4”/3”/2” step on the motor you would get 1750 RPM when using the 4” step, 1313 RPM using the 3” step and 875 using the 2”. Should be good enough for most basic turnings.

-- Jarrett - Mount Vernon, Ohio

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Andybb

1932 posts in 1026 days


#6 posted 04-04-2018 08:28 PM


Alternatively, if you are mechanically inclined, you can get a variable speed DC motor for it, which would give you a wide range of speeds. You can find them for super cheap or free by looking on CL for old treadmills. They have everything you would need except for the pulley on the motor.

In order to change the belt, you need to pull the spindle. They are typically designed so that is a pretty easy task, and one that needs to be done every now and then not just to replace the belt, but also to get to the spindle bearings. Figure out what model you have and get a manual for it. You can search through the photo archive over at the Vintagemachinery site or browse through the catalogs to determine what year/model you have.
Brad
- MrUnix


Yes. It was Brad that guided me towards what I did. You can either change the pulley on the motor to match the v-belt type on the lathe or change the lathe spindle pulley to match the wide grooved style on the treadmill. If you go with the latter and your shaft is 3/4” then call Laguna tools and order the $10 motor pulley for the 1412 and swap that out for the v pulley. The treadmill pulley is an odd size (probably metric) so I had to have a machine shop bore out a standard pulley. I did it that way because keeping the small pulley on the motor which turns at a max of 6000 rpm combined with the size of the spindle pulley turns the shaft at up to 3000 rpm. Also, get rid of the heavy flywheel on the treadmill motor.

Cheers,

-- Andy - Seattle USA

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TooTall17

16 posts in 581 days


#7 posted 04-05-2018 01:36 AM

Thanks for all the advice everyone.

View Woodknack's profile

Woodknack

12845 posts in 2802 days


#8 posted 04-05-2018 02:37 AM

I wouldn’t spend much money on it. Here is some general info on old lathes.
http://thewoodknack.blogspot.com/p/how-to-buy-vintage-lathe.html

-- Rick M, http://thewoodknack.blogspot.com/

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